20373880

素因数分解:

$2^3\times 5^1\times {\mathrm{59}}^1\times {\mathrm{89}}^1\times {\mathrm{97}}^1$

素因数の和:256

約数の個数: 64

約数和(自身を含む): 47628000

約数和(自身を除く): 27254120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 59, 89, 97, 118, 178, 194, 236, 295, 356, 388, 445, 472, 485, 590, 712, 776, 890, 970, 1180, 1780, 1940, 2360, 3560, 3880, 5251, 5723, 8633, 10502, 11446, 17266, 21004, 22892, 26255, 28615, 34532, 42008, 43165, 45784, 52510, 57230, 69064, 86330, 105020, 114460, 172660, 210040, 228920, 345320, 509347, 1018694, 2037388, 2546735, 4074776, 5093470, 10186940, 20373880]

約数ペア:

[(1, 20373880), (2, 10186940), (4, 5093470), (5, 4074776), (8, 2546735), (10, 2037388), (20, 1018694), (40, 509347), (59, 345320), (89, 228920), (97, 210040), (118, 172660), (178, 114460), (194, 105020), (236, 86330), (295, 69064), (356, 57230), (388, 52510), (445, 45784), (472, 43165), (485, 42008), (590, 34532), (712, 28615), (776, 26255), (890, 22892), (970, 21004), (1180, 17266), (1780, 11446), (1940, 10502), (2360, 8633), (3560, 5723), (3880, 5251)]